/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.executor.mpp.execution;

import com.alibaba.polardbx.optimizer.memory.MemoryAllocatorCtx;

public class RecordMemSystemListener implements SystemMemoryUsageListener {

    private MemoryAllocatorCtx allocator;

    public RecordMemSystemListener(MemoryAllocatorCtx allocator) {
        this.allocator = allocator;
    }

    @Override
    public synchronized void updateSystemMemoryUsage(long deltaMemoryInBytes) {
        if (deltaMemoryInBytes > 0) {
            allocator.allocateReservedMemory(deltaMemoryInBytes);
        } else {
            allocator.releaseReservedMemory(-deltaMemoryInBytes, false);
        }
    }
}
